在php中如何使用用户ID调用img

img name is $user->id.jpg or 543.jpg

<?php 
    $logo = "<img src='images/jbjobs/$user->id.jpg'>";
?>

after here

$logo = "<img src='images/jbjobs/

I dont know what to do and I have to escape ' or ".

Try

<?php 

$logo = "<img src='images/jbjobs/{$user->id}.jpg'>"; // {} is like concatenate 

?>

Any of the following will do:

$logo = "<img src='images/jbjobs/{$user->id}.jpg'>";
$logo = "<img src='images/jbjobs/".$user->id.".jpg'>";